Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6732bc65 LP |
2 | #ifndef __ASM_SUSPEND_H |
3 | #define __ASM_SUSPEND_H | |
4 | ||
623b476f | 5 | #define NR_CTX_REGS 12 |
adc9b2df | 6 | #define NR_CALLEE_SAVED_REGS 12 |
6732bc65 LP |
7 | |
8 | /* | |
9 | * struct cpu_suspend_ctx must be 16-byte aligned since it is allocated on | |
10 | * the stack, which must be 16-byte aligned on v8 | |
11 | */ | |
12 | struct cpu_suspend_ctx { | |
13 | /* | |
14 | * This struct must be kept in sync with | |
15 | * cpu_do_{suspend/resume} in mm/proc.S | |
16 | */ | |
17 | u64 ctx_regs[NR_CTX_REGS]; | |
18 | u64 sp; | |
19 | } __aligned(16); | |
95322526 | 20 | |
adc9b2df JM |
21 | /* |
22 | * Memory to save the cpu state is allocated on the stack by | |
23 | * __cpu_suspend_enter()'s caller, and populated by __cpu_suspend_enter(). | |
24 | * This data must survive until cpu_resume() is called. | |
25 | * | |
26 | * This struct desribes the size and the layout of the saved cpu state. | |
27 | * The layout of the callee_saved_regs is defined by the implementation | |
28 | * of __cpu_suspend_enter(), and cpu_resume(). This struct must be passed | |
29 | * in by the caller as __cpu_suspend_enter()'s stack-frame is gone once it | |
30 | * returns, and the data would be subsequently corrupted by the call to the | |
31 | * finisher. | |
32 | */ | |
33 | struct sleep_stack_data { | |
34 | struct cpu_suspend_ctx system_regs; | |
35 | unsigned long callee_saved_regs[NR_CALLEE_SAVED_REGS]; | |
36 | }; | |
37 | ||
cabe1c81 JM |
38 | extern unsigned long *sleep_save_stash; |
39 | ||
af391b15 | 40 | extern int cpu_suspend(unsigned long arg, int (*fn)(unsigned long)); |
95322526 | 41 | extern void cpu_resume(void); |
adc9b2df JM |
42 | int __cpu_suspend_enter(struct sleep_stack_data *state); |
43 | void __cpu_suspend_exit(void); | |
82869ac5 JM |
44 | void _cpu_resume(void); |
45 | ||
46 | int swsusp_arch_suspend(void); | |
47 | int swsusp_arch_resume(void); | |
48 | int arch_hibernation_header_save(void *addr, unsigned int max_size); | |
49 | int arch_hibernation_header_restore(void *addr); | |
50 | ||
8ec058fd JM |
51 | /* Used to resume on the CPU we hibernated on */ |
52 | int hibernate_resume_nonboot_cpu_disable(void); | |
53 | ||
6732bc65 | 54 | #endif |